JPH09111600A - Back roller lift in loom - Google Patents

Abstract

PROBLEM TO BE SOLVED: To facilitate the work for transferring a back roller onto a place not interfering with a warp beam to be attached to/detached from a loom. SOLUTION: A lift lever 24 is supported on a second back bracket 17 revolvably around a support shaft 25. The bolt 26 at the basal end of the lift lever 24 is possible to be in contact with the projection 173 on the inside face of the second back bracket 17. The projection 173 regulates the right rotation of the lift lever 24 around the support shaft 25. The lift lever 24 transfers the back roller 13 from its waiting position onto a retreating position thereabove by the operation of a handle 28.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a back roller lifting device for a loom.

[0002]

2. Description of the Related Art When changing the type of fabric, weaving conditions relating to warp, such as vertical position and front and rear position of a back roller, mechanical adjustment parts such as size of warp opening and closing timing, etc. are adjusted to the type of fabric. Need to be adjusted. Among them, a back roller that guides the warp drawn out from the warp beam is supported by a back bracket that supports the back roller as disclosed in, for example, Japanese Patent Laid-Open No. 4-50346, and the back bracket is a side frame of a loom. It is supported so that its mounting height can be adjusted. The vertical position of the back roller is adjusted by adjusting the mounting height position of the back bracket with respect to the side frame.

[0003]

When exchanging the warp beam, the warp beam is supported by rolling back on the warp beam support bracket, and depending on the type of fabric, the height position of the back roller is different from the warp beam on the take-out path. May be low enough to interfere. Therefore, the back roller must be moved to a place where it does not interfere with the warp beam, but this transfer work is troublesome. If the back roller is heavy, it will be hard work.

It is an object of the present invention to facilitate the work of transferring the back roller to a place where it does not interfere with the warp beam that is attached to and detached from the loom.

[0005]

To this end, according to the invention of claim 1, a lifting lever is arranged to be moved from the standby position to the retracted holding position in order to lift the back roller from its warp guide position to a retracted position above it. A back roller lifting device having a holding means for holding the lifting lever at the retracted holding position of the lifting lever when the back roller is arranged at the retracted position is configured.

According to another aspect of the present invention, the retracting and holding position of the lifting lever is provided in front of the rotation top dead center of the lifting lever, and the blocking position for blocking downward movement of the lifting lever in the retracting and holding position, and the lifting lever. The holding means is constituted by a stopper which is arranged to be switched to a retracted position which is out of the rotation path of the.

According to the third aspect of the present invention, the holding position of the lifting lever is provided at a position beyond the top dead center of rotation of the lifting lever, and the holding means is provided by a stopper that prevents downward movement of the lifting lever on the retracted position. Configured.

In the invention of claim 4, a holding recess is formed on the tip side of the lifting lever, and when the lifting lever is moved upward, the holding roller is separated from the bottom of the holding recess with respect to the back roller on the warp guide position. The back roller is moved to the bottom portion as the lifting lever moves upward.

According to the invention of claim 1, the lifting lever that lifts the back roller from the warp guide position to the retracted position is held at the retracted holding position by the holding means.
The operation of the lifting lever is easy, and even when the back roller is heavy, the back roller can be easily lifted by setting the lever ratio of the lifting lever to an appropriate value.

According to the second aspect of the present invention, the retracted holding position of the lifting lever when the back roller is lifted to the retracted position is before the top dead center of rotation of the lifting lever. The lifting lever tries to move downward from the retracted holding position by the weight of the back roller and the lifting lever, but this downward movement is blocked by a stopper arranged at a position that interferes with the rotation path of the lifting lever.

According to the third aspect of the invention, when the back roller is lifted to the retracted position, the retracted holding position of the lifting lever is a position beyond the top dead center of rotation of the lifting lever. The lifting lever tries to move downward from the retracted holding position by the weight of the back roller, but this downward movement is blocked by a stopper arranged at a position that interferes with the rotation path of the lifting lever.

According to the present invention, when the lifting lever is rotated to lift the back roller from the warp holding position, the back roller immediately moves to the bottom of the holding recess along the longitudinal direction of the lifting lever. Therefore, when the back roller is pivotally arranged from the warp guide position to the retracted position, the radius of rotation of the back roller becomes small, and it becomes easy to avoid interference with other members.

[0013]

DETAILED DESCRIPTION OF THE INVENTION A first embodiment of the present invention will be described below with reference to FIGS.

The warp beam 11 is supported on a support bracket 12 as shown in FIG.
The warp yarn T drawn out from is guided by the back roller 13 and the easing roller 14.

Back brackets 16 are attached to both side frames 15 of the loom, and a second back bracket 17 is supported on the back brackets 16 so that the attachment position can be adjusted vertically. Back bracket 1
6 and the second back bracket 17 can be slid up and down by the guide action between the guide hole 161 on the back bracket 16 side and the guided piece 171 on the second back bracket 17 side. The second back bracket 17 is fastened and fixed to the back bracket 16 with bolts 18. An adjusting bolt 19 is screwed onto the upper bent piece 172 of the second back bracket 17. The adjusting bolt 19 is tightened and fixed to the upper bent piece 172 by a nut 20, and the tip of the adjusting bolt 19 is in contact with the upper end of the back bracket 16. Therefore, by adjusting the screwing position of the adjustment bolt 19 with respect to the second back bracket 17, it is possible to adjust the vertical mounting position of the second back bracket 17 with respect to the back bracket 16.

As shown in FIG. 2, back roller brackets 21 are supported on the left and right second back brackets 17. The back roller 13 is erected and supported between the left and right back roller brackets 21. Back roller 1
A bearing 132 is attached to the roller shaft 131 of No. 3, and the bearing 132 is fitted in the support seat 211 of the back roller bracket 21. Bearing 1
The position of the back roller 13 when 32 is fitted in the support seat 211 is the warp guide position.

An easing bracket 22 is swingably supported on each back roller bracket 21 about a support shaft 221. The easing roller 14 is erected and supported between the left and right easing brackets 22. The easing bracket 22 is operatively connected to a crank mechanism (not shown) via a connecting rod 23. By the crank mechanism that operates in synchronization with the loom drive motor, the easing roller 14 swings around the support shaft 221 in accordance with the warp opening / closing port.

A lifting lever 24 is rotatably supported on the inner surface of the left and right second back brackets 17 about a support shaft 25. The rotation locus of the lifting lever 24 is orthogonal to the axis of the back roller 13. A holding recess 241 is formed on the tip end side of the lifting lever 24. A bolt 26 is screwed onto the base end of the lifting lever 24. The bolt 26 is fixed to the lifting lever 24 by tightening a nut 27. Bolt 26
Is a protrusion 17 on the inner surface of the second back bracket 17.
3 can be contacted. In FIG. 3, the protrusion 173 is the spindle 2.
The rightward rotation of the lifting lever 24 about 5 is restricted. When the bolt 26 is in contact with the protrusion 173, the tip of the lifting lever 24 is located below the roller shaft 131 of the back roller 13 in the warp guide position. This position is the standby position for the lifting lever 24.

A handle 28 is fixed to the base end of the lifting lever 24. The handle 28 can come into contact with the protrusion 173. When the handle 28 is in contact with the protrusion 173, the lifting lever 24 is located on the standby position side with respect to its top dead center. In FIG. 3, the handle 28 has a protrusion 173.
The left turn is restricted by.

As shown in FIG. 4, the second back bracket 17 has a stopper 29 in the form of a shaft pin, which is formed on the back roller 1.
3 is slidably supported in the axial direction. A retaining ring 291 is attached to both ends of the stopper 29. The stopper 29 is switched between a blocking position shown by a chain line and a retracted position shown by a solid line. The stopper 29 in the blocking position intersects with the rotation locus of the lifting lever 24, and the stopper 29 in the retracted position deviates from the rotation locus of the lifting lever 24.

When replacing the warp beam 11, the warp beam 11 rolls on the support bracket 12 and is taken out from the loom. However, when the back roller 13 interferes with the rolling warp beam 11, the handle 28 is operated. Then, the back roller 13 may be lifted. In the state of FIG. 3, the lifting lever 24 is urged clockwise by its own weight, and the bolt 26 is in contact with the protrusion 173. In order to operate the handle 28, first, the stopper 29 is arranged at the retracted position, and the handle 28 is pulled toward the protrusion 173 side. By this pulling operation, the lifting lever 24 moves upward, and the tip end side of the holding recess 241 contacts the roller shaft 131 of the back roller 13. Lifting lever 24
Is further moved upward, the back roller 13 is lifted upward from the warp guide position. The bearing 132 supports the seat 21.
When released from 1, the roller shaft 131 lifts the lever 2
4, the inside of the holding recess 241 rolls toward the bottom 242, and the roller shaft 131 fits in the bottom 242 as shown in FIG.

After the handle 28 is brought into contact with the projection 173 by the pulling operation of the handle 28, the stopper 29 is placed at the blocking position. If the lifting lever 24 tries to rotate toward the standby position due to the weight of the back roller 13 when the hand is released from the handle 28, the stopper 29 contacts the handle 28 as shown in FIG. To do. The position of the back roller 13 in FIG. 6 is a retracted position higher than the warp guide position, and the position of the lifting lever 24 when the handle 28 abuts the stopper 29 is the retracted holding position for holding the back roller 13 in the retracted position. The position.

After the warp beam 11 is exchanged, the handle 28 is pulled and operated to move the handle 2 to the protrusion 173.
8 are brought into contact with each other, and the stopper 29 is placed in the retracted position in this state. Then, the handle 2 is entrusted to the clockwise biasing of the lifting lever 24 by the weight of the back roller 13.
8 is operated, the lifting lever 24 returns to the standby position, and the back roller 13 is arranged at the warp guide position.

In the structure using the lifting lever 24, the back roller 13 can be easily lifted from the warp guide position to the upper retracted position by operating the handle 28 which is a part of the lifting lever 24. Therefore, it is easy to move the back roller 13 to a place where it does not interfere with the warp beam 11 that is attached to and detached from the loom. Back roller 1
Even when 3 is heavy, the back roller 13 can be easily lifted by appropriately setting the length of the handle 28, that is, by setting the lever ratio of the lever composed of the lifting lever 24 and the handle 28 to an appropriate value. You can

The easing roller 14 is replaced with the back roller 13
If it is arranged as close as possible to the loom, a space can be provided for mounting other parts, for example, a dropper drop detection type warp cutting detection device on the loom. In the illustrated case, if the back roller 13 at the warp guide position and the support shaft 25 are rotated while keeping the same radius, the back roller 13 contacts the easing roller 14. However, in this embodiment, when the back roller 13 is slightly lifted from the warp guide position, the roller shaft 131 of the back roller 13 is held by the holding recess 2
Immediate transition to bottom 242 of 41. Therefore, spindle 2
The turning radius of the back roller 13 around 5 becomes small, and the back roller 13 does not contact the easing roller 14.

Next, a second embodiment shown in FIGS. 7 and 8 will be described. The same components as those in the first embodiment are denoted by the same reference numerals. In this embodiment, the lifting lever 30
A stopper 31 provided at the base end of the back roller bracket 21 can abut the side edge of the back roller bracket 21. As shown in FIG. 7, the roller shaft 131 of the back roller 13 on the warp guide position is in the standby position, and the holding recess 3 on the front end side of the lifting lever 30.
It is getting inside 01. When the handle 28 is pulled up until the stopper 31 comes into contact with the back roller bracket 21, the lifting lever 30 is placed at the retracted holding position beyond the rotation top dead center as shown in FIG. The lifting lever 30 arranged in the retracted holding position is biased counterclockwise about the support shaft 25 by the weight of the back roller 13, but the contact between the stopper 31 and the back roller bracket 21 retracts the lifting lever 30. Hold in the holding position.

In this embodiment, like the first embodiment, the back roller 13 can be easily moved from the warp guide position to the upper retracted position, and the stopper 29 of the first embodiment is switched. The work like is unnecessary.

Next, a third embodiment shown in FIGS. 9 and 10 will be described. The same components as those in the second embodiment are denoted by the same reference numerals. In this embodiment, the first support seat 2 for holding the back roller bracket 21 at the warp guide position is provided.
12 and the second support seat 213 for holding the back roller bracket 21 in the retracted position.
Is formed. Bearing 13 of back roller 13
2 can roll and move from the first support seat 212 to the second support seat 213. By the pulling operation of the handle 28, the lifting lever 33 rotates from the standby position of FIG. 9 to the retracted holding position of FIG. 10 about the support shaft 25, and the bearing 132 of the back roller 13 moves from the first support seat 212 to the second support seat 212.
To the support seat 213.

In this embodiment, as in the second embodiment, the back roller 13 can be easily moved from the warp guide position to the upper retracted position. Moreover, since the bearing 132 is fitted and supported by the support seat 213, the second lever for holding the lifting lever 33 in the retracted holding position.
Since the holding means such as the positioning pin 31 and the protrusion 32 in the above embodiment is unnecessary, the configuration is simplified.

Inventions other than those described in the claims which can be grasped from the above-described embodiment will be described below together with their effects. (1) In claim 1, a member (a back roller bracket 21 in the embodiment) that supports the back roller has a first support seat that holds the back roller at the warp guide position and a second support seat that holds the back roller at the retracted position. And a back roller lifting device in a loom provided with a support seat.

The second support seat serves as a holding means for holding the lifting lever at the retracted holding position of the lifting lever, which simplifies the structure. The effects of the embodiment will be described below. (1) In the embodiment in which the retracted position of the lifting lever is set to a position beyond the top dead center of rotation of the lifting lever, stoppers are provided at a position that intersects with the rotation locus of the lifting lever and a position that deviates from the rotation locus. There is no need to switch. (2) When the back roller is lifted from the warp holding position by rotating the lifting lever, the back roller immediately moves to the bottom of the holding recess along the longitudinal direction of the lifting lever. The turning radius of the back roller when the back roller is rotationally arranged is small, and it is easy to avoid interference with other members.

[0032]

As described in detail above, in the present invention, the back lever is lifted from its warp guide position to its higher retracted position by the lifting lever.
This has an excellent effect that the back roller can be easily transferred to a place where it does not interfere with the warp beam that is attached to and detached from the loom.

[Brief description of the drawings]

FIG. 1 is a side sectional view showing a first embodiment.

FIG. 2 is a rear view.

FIG. 3 is an enlarged side sectional view of a main part.

FIG. 4 is an enlarged rear view of a main part.

FIG. 5 is an enlarged side sectional view of an essential part showing a state where the back roller is slightly lifted from the warp guide position.

FIG. 6 is an enlarged side sectional view of an essential part showing a state in which a back roller is arranged at a retracted position.

FIG. 7 is an enlarged side sectional view of an essential part showing a second embodiment.

FIG. 8 is an enlarged side sectional view of an essential part showing a state in which a back roller is arranged at a retracted position.

FIG. 9 is an enlarged side sectional view of an essential part showing a third embodiment.

FIG. 10 is an enlarged side sectional view of an essential part showing a state where the back roller is arranged at the retracted position.

[Explanation of symbols]

13 ... Back roller, 213 ... Support seat serving as holding means,
24, 30, 33 ... Lifting lever, 241, 301 ...
Retaining recesses, 29, 31 ... Stoppers.

Claims (4)

[Claims] 1. A loom having a back roller for guiding a warp drawn from a warp beam, wherein the loom is moved from a standby position to a retracted holding position to lift the back roller from its warp guiding position to a retracted position higher than the warp guiding position. A back roller lifting device for a loom, comprising: a lifting lever that holds the lifting lever; and a holding unit that holds the lifting lever at a retracted holding position of the lifting lever when the back roller is located at the retracted position. 2. The retracting and holding position of the lifting lever is on the standby position side with respect to the rotation top dead center of the lifting lever, and the holding means includes a blocking position for blocking downward movement of the lifting lever in the retracting and holding position, The back roller lifting device for a loom according to claim 1, wherein the back roller lifting device is a stopper that is arranged to be switched to a retracted position out of a rotation path of the lifting lever. 3. The retracting position of the lifting lever is located at a position beyond the top dead center of rotation of the lifting lever, and the holding means is a stopper for preventing downward movement of the lifting lever at the retracting position. A back roller lifting device for a loom according to item 1. 4. A holding recess is formed on the tip end side of the lifting lever, and when the lifting lever is moved upward, a portion separated from the bottom of the holding recess with respect to the back roller on the warp guide position is formed. The back roller lifting device for a loom according to any one of claims 1 to 3, wherein the back roller is brought into contact with the back lever and moved to the bottom portion as the lifting lever moves upward.